64 a-body and C5 corvette center bore

[64Chevelle]

Hi,

I'm having wheel spacers custom made to fit C5 wheels on my 64 Chevelle. I have figured out that I need 2" wide spacers and the bolt pattern is the same 5 x 4 3/4" on both. But I haven't been able to figure out the center bore on any one of them. Please help if you know either or both specs. Thanks in advance!

[64Chevelle]

I found the center bore/hub diameter for the C5 Corvette: 7 mm which roughly equates to 2 3/4".

Just the Chevelle hub diameter left to nail... anyone? I've got a hunch they are the same size as the corvette hubs, but I'm not 100% sure.

[Apogee]

C5/C6 Corvette = 70.30mm [2.768"]
64-72 GM A-body = 70.50mm [2.776"]

I just measured my C6 5-spoke wheels to (re)confirm and it is 70.3mm spot on. You're not using rough fractional dimensions to design wheel adapters are you? You should also keep in mind that the rear axle registers tend to be oversized, so I would recommend measuring yours and making the adapters to match.

Tobin
KORE3

[64Chevelle]

Due to discovering that my rear axle is not an original 64, but rather from a second gen Camaro, I have postponed the wheel spacer/adapter purchase...

I have AFX spindles up front now and as far as I know they come with the C5 hub and 70.3 center bore. By the way, H&R (wheel spacer maker in Germany) lists the C6 and later F-body cars as having a 70.2 mm center bore. I couldn't find the C5 listed though.

As for the 10 bolt 8.5" 2nd gen Camaro rear I have no idea what the center bore is, but I'll measure it once I get home.

Am I correct so far?

Any ideas how much spacer width I need in the front and rear with this combination? I'm not sure if the AFX spindles increase or decrease track width, but the 2nd gen Camaro rear certainly is wider than the stock rear.

Any help will be greatly appreciated.

[64Chevelle]

C5/C6 Corvette = 70.30mm [2.768"]
64-72 GM A-body = 70.50mm [2.776"]

I just measured my C6 5-spoke wheels to (re)confirm and it is 70.3mm spot on. You're not using rough fractional dimensions to design wheel adapters are you? You should also keep in mind that the rear axle registers tend to be oversized, so I would recommend measuring yours and making the adapters to match.

Tobin
KORE3

You were right about the rear axle, I measured 70.60mm, I believe it's supposed to be 70.50.

Well, that basically leaves me with one more thing to figure out. Rear spacer width. I might as well wait and measure it once I get the axle back in the car...